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Method and apparatus for a declarative representation of distortion correction for add-on graphics in broadcast video

  • US 6,850,250 B2
  • Filed: 08/28/2001
  • Issued: 02/01/2005
  • Est. Priority Date: 08/29/2000
  • Status: Expired due to Fees
First Claim
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1. A method of distorting add-on graphics to be composited with a streaming video feed comprising:

  • receiving a streaming video feed captured using a real camera, said streaming video feed including an image frame taken from a particular view point and a particular field of view, said real camera introducing image distortions into the image frame;

    measuring a plurality of camera instrumentation data corresponding to at least said view point, said field of view, and distortion parameters corresponding to the image distortions of the image frame;

    creating a virtual camera;

    setting the virtual view point and the virtual field of view of the virtual camera using the plurality of camera instrumentation data;

    generating add-on graphics having a size and an insertion position within the image frame based on the virtual camera;

    creating a distortion grid;

    distorting the add-on graphics to match the image distortions of the image frame; and

    compositing the distorted add-on graphics with the image frame of the streaming video feed.

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